Generac Power Systems 249345 GP Series 6500W Portable GeneratorMfr # 249345. Features Portable generators feature generac OHV engine Incorporates full pressure lubrication with automotive style spin on oil filter for longer life engine Generac OHV engine recoil pull start Includes co sense technology An integrated digital co sensor that continuously monitors co levels at a rate 1,000 time faster 3 times more accurate than a traditional household co detector Powerrush technology boosts electrical current up to 2.